package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;

/**
 * @Author Cl
 * @Date 2024-2024/3/29  8:28
 * @Description 登录功能
 */
@Controller
public class LoginController implements CommunityConstant {

    @Autowired
    private UserService userService;
    @Autowired
    private Producer kaptchaProducer;
    @Value("${server.servlet.context-path}")
    private String contextPath;
    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);


    /**展示注册页面*/
    @RequestMapping(path="/register" , method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    /** 处理注册请求*/
    @RequestMapping(path = "/register",method = RequestMethod.POST)
    public String register(Model model , User user){ // user通过
        Map<String, Object> map = userService.register(user);
        if(map == null || map.isEmpty()){
            // 注册成功逻辑
            model.addAttribute("msg","注册成功,我们已经向您的邮箱发送了一封激活邮件,请尽快激活!");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            // 注册失败逻辑
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

     /**处理激活请求*/
    @RequestMapping(path = "/activation/{userId}/{code}" , method = RequestMethod.GET)
    public String activation(Model model , @PathVariable("userId") int userId , @PathVariable("code") String code){
        int res = userService.activation(userId, code);
        if(res == ACTIVATION_SUCCESS){
            model.addAttribute("msg" , "激活成功 , 您的账号已经可以正常使用了 !");
            model.addAttribute("target" , "/login");
        }else if(res == ACTIVATION_REPEAT){
            model.addAttribute("msg" , "无效操作 , 改账号已经激活过了");
            model.addAttribute("target" , "/index");
        }else {
            model.addAttribute("msg" , "激活失败 , 您提供的激活码不正确");
            model.addAttribute("target" , "/index");
        }
        return "/site/operate-result";
    }

    /**处理登录页面请求*/
    @RequestMapping(path = "/login" , method = RequestMethod.GET )
    public String getLoginPage(){
        return "/site/login";
    }

    /**生成随机验证图片的后端接口*/
    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response , HttpSession session){
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);
        session.setAttribute("kaptcha",text);
        response.setContentType("image/png");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image , "png",os);
        } catch (IOException e) {
            logger.error("响应验证码失败:"+e.getMessage());
        }
    }

    /**处理登录请求*/
    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username,String password, String code, boolean rememberme,
                        Model model , HttpSession session , HttpServletResponse response){
        // 检查验证码
        String kaptcha = (String) session.getAttribute("kaptcha");
        if(StringUtils.isBlank(code) || StringUtils.isBlank(kaptcha) || !kaptcha.equals(code)){
            model.addAttribute("codeMsg" , "验证码不正确!");
            return "/site/login";
        }
        // 检查账号密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if(map.containsKey("ticket")){
            // 登录成功
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else {
            // 登录失败
            model.addAttribute("usernameMsg" , map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }
    }

    /**退出登录*/
    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        return "redirect:/login";
    }
}
